Some of you may be wondering “why would you want to use Rails without a database?” There are several situations why a database would not be needed, and I’ve run into quite a few of them. One of the specific cases was when I wanted to write a web interface for an application that only had a REST interface available to the public.
If you find yourself needing to write a Rails application without a database, just do the following:
For Rails 1.0 and up:
For Rails 2.1 and up: Comment out both of the lines that begin with